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<div class="title">channel_v1.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160; </div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="keyword">namespace </span>resumef</div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;{</div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;    <span class="keyword">namespace </span>detail</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;    {</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty&gt;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;        <span class="keyword">struct </span>channel_impl : <span class="keyword">public</span> std::enable_shared_from_this&lt;channel_impl&lt;_Ty&gt;&gt;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;        {</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;            <span class="keyword">typedef</span> _awaker&lt;channel_impl&lt;_Ty&gt;, _Ty*, error_code&gt; channel_read_awaker;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;            <span class="keyword">typedef</span> std::shared_ptr&lt;channel_read_awaker&gt; channel_read_awaker_ptr;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;            <span class="keyword">typedef</span> _awaker&lt;channel_impl&lt;_Ty&gt;&gt; channel_write_awaker;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;            <span class="keyword">typedef</span> std::shared_ptr&lt;channel_write_awaker&gt; channel_write_awaker_ptr;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;            <span class="keyword">typedef</span> std::pair&lt;channel_write_awaker_ptr, _Ty&gt; write_tuple_type;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;            <span class="comment">//typedef spinlock lock_type;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;            <span class="keyword">typedef</span> std::recursive_mutex lock_type;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;            lock_type _lock;                                    <span class="comment">//保证访问本对象是线程安全的</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">size_t</span> _max_counter;                          <span class="comment">//数据队列的容量上限</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;            std::deque&lt;_Ty&gt; _values;                            <span class="comment">//数据队列</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;            std::list&lt;channel_read_awaker_ptr&gt; _read_awakes;    <span class="comment">//读队列</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;            std::list&lt;write_tuple_type&gt; _write_awakes;          <span class="comment">//写队列</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;        <span class="keyword">public</span>:</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;            channel_impl(<span class="keywordtype">size_t</span> max_counter_)</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;                :_max_counter(max_counter_)</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;            {</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;            }</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160; </div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;            <span class="keyword">const</span> std::deque&lt;_Ty&gt;&amp; debug_queue()<span class="keyword"> const</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keyword">            </span>{</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;                <span class="keywordflow">return</span> _values;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;            }</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;            <span class="keyword">template</span>&lt;<span class="keyword">class</span> callee_t, <span class="keyword">class</span> = std::enable_if&lt;!std::is_same&lt;std::remove_cv_t&lt;callee_t&gt;, channel_read_awaker_ptr&gt;::value&gt;&gt;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            decltype(<span class="keyword">auto</span>) read(callee_t&amp;&amp; awaker)</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;            {</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;                <span class="keywordflow">return</span> read_(std::make_shared&lt;channel_read_awaker&gt;(std::forward&lt;callee_t&gt;(awaker)));</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;            }</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;            <span class="keyword">template</span>&lt;<span class="keyword">class</span> callee_t, <span class="keyword">class</span> _Ty2, <span class="keyword">class</span> = std::enable_if&lt;!std::is_same&lt;std::remove_cv_t&lt;callee_t&gt;, channel_write_awaker_ptr&gt;::value&gt;&gt;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            decltype(<span class="keyword">auto</span>) write(callee_t&amp;&amp; awaker, _Ty2&amp;&amp; val)</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;            {</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;                <span class="keywordflow">return</span> write_(std::make_shared&lt;channel_write_awaker&gt;(std::forward&lt;callee_t&gt;(awaker)), std::forward&lt;_Ty2&gt;(val));</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            }</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160; </div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;            <span class="comment">//如果已经触发了awaker,则返回true</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;            <span class="comment">//设计目标是线程安全的，实际情况待考察</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            <span class="keywordtype">bool</span> read_(channel_read_awaker_ptr&amp;&amp; r_awaker)</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;                assert(r_awaker);</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                scoped_lock&lt;lock_type&gt; lock_(this-&gt;_lock);</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                <span class="keywordtype">bool</span> ret_value;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                <span class="keywordflow">if</span> (_values.size() &gt; 0)</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                {</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                    <span class="comment">//如果数据队列有数据，则可以直接读数据</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                    <span class="keyword">auto</span> val = std::move(_values.front());</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                    _values.pop_front();</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160; </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                    r_awaker-&gt;awake(<span class="keyword">this</span>, 1, &amp;val, error_code::none);</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                    ret_value = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                }</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                <span class="keywordflow">else</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                {</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;                    <span class="comment">//否则，将“读等待”放入“读队列”</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                    _read_awakes.push_back(r_awaker);</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                    ret_value = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                }</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160; </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                <span class="comment">//如果已有写队列，则唤醒一个“写等待”</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;                awake_one_writer_();</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160; </div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;                <span class="keywordflow">return</span> ret_value;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            }</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160; </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;            <span class="comment">//设计目标是线程安全的，实际情况待考察</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;            <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty2&gt;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;            <span class="keywordtype">void</span> write_(channel_write_awaker_ptr&amp;&amp; w_awaker, _Ty2&amp;&amp; val)</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;            {</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;                assert(w_awaker);</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                scoped_lock&lt;lock_type&gt; lock_(this-&gt;_lock);</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160; </div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                <span class="comment">//如果满了，则不添加到数据队列，而是将“写等待”和值，放入“写队列”</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                <span class="keywordtype">bool</span> is_full = _values.size() &gt;= _max_counter;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;                <span class="keywordflow">if</span> (is_full)</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;                    _write_awakes.push_back(std::make_pair(std::forward&lt;channel_write_awaker_ptr&gt;(w_awaker), std::forward&lt;_Ty2&gt;(val)));</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;                <span class="keywordflow">else</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;                    _values.push_back(std::forward&lt;_Ty2&gt;(val));</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160; </div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                <span class="comment">//如果已有读队列，则唤醒一个“读等待”</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;                awake_one_reader_();</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160; </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;                <span class="comment">//触发 没有放入“写队列”的“写等待”</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;                <span class="keywordflow">if</span> (!is_full) w_awaker-&gt;awake(<span class="keyword">this</span>, 1);</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;            }</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160; </div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        <span class="keyword">private</span>:</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;            <span class="comment">//只能被write_函数调用，内部不再需要加锁</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;            <span class="keywordtype">void</span> awake_one_reader_()</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;            {</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;                <span class="comment">//assert(!(_read_awakes.size() &gt;= 0 &amp;&amp; _values.size() == 0));</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160; </div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;                <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = _read_awakes.begin(); iter != _read_awakes.end(); )</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;                {</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;                    <span class="keyword">auto</span> r_awaker = *iter;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;                    iter = _read_awakes.erase(iter);</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160; </div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;                    <span class="keywordflow">if</span> (r_awaker-&gt;awake(<span class="keyword">this</span>, 1, _values.size() ? &amp;_values.front() : <span class="keyword">nullptr</span>, error_code::read_before_write))</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;                    {</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                        <span class="keywordflow">if</span> (_values.size()) _values.pop_front();</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160; </div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;                        <span class="comment">//唤醒一个“读等待”后，尝试唤醒一个“写等待”，以处理“数据队列”满后的“写等待”</span></div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                        awake_one_writer_();</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                        <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;                    }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                }</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;            }</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160; </div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            <span class="comment">//只能被read_函数调用，内部不再需要加锁</span></div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            <span class="keywordtype">void</span> awake_one_writer_()</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;            {</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;                <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = _write_awakes.begin(); iter != _write_awakes.end(); )</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;                {</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;                    <span class="keyword">auto</span> w_awaker = std::move(*iter);</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                    iter = _write_awakes.erase(iter);</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160; </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;                    <span class="keywordflow">if</span> (w_awaker.first-&gt;awake(<span class="keyword">this</span>, 1))</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;                    {</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;                        <span class="comment">//一个“写等待”唤醒后，将“写等待”绑定的值，放入“数据队列”</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;                        _values.push_back(std::move(w_awaker.second));</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;                        <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;                    }</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;                }</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            }</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160; </div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;            <span class="keywordtype">size_t</span> capacity() const noexcept</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;            {</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;                <span class="keywordflow">return</span> _max_counter;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;            }</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160; </div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;            channel_impl(<span class="keyword">const</span> channel_impl&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;            channel_impl(channel_impl&amp;&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;            channel_impl&amp; operator = (<span class="keyword">const</span> channel_impl&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;            channel_impl&amp; operator = (channel_impl&amp;&amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        };</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    }   <span class="comment">//namespace detail</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160; </div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="keyword">namespace </span>channel_v1</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;{</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160; </div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty&gt;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keyword">struct </span>channel_t</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    {</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        <span class="keyword">typedef</span> detail::channel_impl&lt;_Ty&gt; channel_impl_type;</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_impl_type::channel_read_awaker channel_read_awaker;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_impl_type::channel_write_awaker channel_write_awaker;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160; </div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        <span class="keyword">typedef</span> std::shared_ptr&lt;channel_impl_type&gt; channel_impl_ptr;</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;        <span class="keyword">typedef</span> std::weak_ptr&lt;channel_impl_type&gt; channel_impl_wptr;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        <span class="keyword">typedef</span> std::chrono::system_clock clock_type;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;        channel_impl_ptr _chan;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;        channel_t(<span class="keywordtype">size_t</span> max_counter = 0)</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;            :_chan(std::make_shared&lt;channel_impl_type&gt;(max_counter))</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;        {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160; </div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        }</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160; </div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty2&gt;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;        future_t&lt;bool&gt; write(_Ty2&amp;&amp; val)<span class="keyword"> const</span></div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;<span class="keyword">        </span>{</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;            awaitable_t&lt;bool&gt; awaitable;</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160; </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;            <span class="keyword">auto</span> awaker = std::make_shared&lt;channel_write_awaker&gt;(</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;                [st = awaitable._state](channel_impl_type* chan) -&gt; <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;                {</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;                    st-&gt;set_value(chan ? true : false);</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;                    return true;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;                });</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;            _chan-&gt;write_(std::move(awaker), std::forward&lt;_Ty2&gt;(val));</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160; </div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;            <span class="keywordflow">return</span> awaitable.get_future();</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        }</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160; </div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;        future_t&lt;_Ty&gt; read()<span class="keyword"> const</span></div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="keyword">        </span>{</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;            awaitable_t&lt;_Ty&gt; awaitable;</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160; </div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;            <span class="keyword">auto</span> awaker = std::make_shared&lt;channel_read_awaker&gt;(</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;                [st = awaitable._state](channel_impl_type*, _Ty* val, error_code fe) -&gt; <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;                {</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;                    if (val)</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;                        st-&gt;set_value(std::move(*val));</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;                    else</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;                        st-&gt;throw_exception(channel_exception{ fe });</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160; </div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;                    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;                });</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;            _chan-&gt;read_(std::move(awaker));</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160; </div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;            <span class="keywordflow">return</span> awaitable.get_future();</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;        }</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160; </div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> _Ty2&gt;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;        future_t&lt;bool&gt; operator &lt;&lt; (_Ty2&amp;&amp; val)<span class="keyword"> const</span></div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;<span class="keyword">        </span>{</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;            <span class="keywordflow">return</span> std::move(write(std::forward&lt;_Ty2&gt;(val)));</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        }</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160; </div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;        future_t&lt;_Ty&gt; <span class="keyword">operator</span> co_await ()<span class="keyword"> const</span></div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;<span class="keyword">        </span>{</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;            <span class="keywordflow">return</span> read();</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;        }</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160; </div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;<span class="preprocessor">#if _DEBUG</span></div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;        <span class="comment">//非线程安全，返回的队列也不是线程安全的</span></div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;        <span class="keyword">const</span> <span class="keyword">auto</span>&amp; debug_queue()<span class="keyword"> const</span></div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;<span class="keyword">        </span>{</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;            <span class="keywordflow">return</span> _chan-&gt;debug_queue();</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;        }</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160; </div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;        <span class="keywordtype">size_t</span> capacity() const noexcept</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;        {</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;            <span class="keywordflow">return</span> _chan-&gt;capacity();</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;        }</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160; </div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        channel_t(<span class="keyword">const</span> channel_t&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;        channel_t(channel_t&amp;&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        channel_t&amp; operator = (<span class="keyword">const</span> channel_t&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        channel_t&amp; operator = (channel_t&amp;&amp;) = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    };</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160; </div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160; </div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    <span class="keyword">using</span> semaphore_t = channel_t&lt;bool&gt;;</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160; </div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;}   <span class="comment">//namespace v1</span></div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;}   <span class="comment">//namespace resumef</span></div>
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